Every laminate flooring manufacturer has its own recommended installation procedures, so it’s probably best to hire a professional installer from your local retailer.
 However, if you are contemplated doing-it-yourself check this pointer out:

•    Do not bring a floor home and install it!  All laminate floors must be allowed to acclimate to their final surroundings for at least 48 hours. The flooring must be allowed to adjust to its new environmental conditions and humidity levels before starting installation.
•    Use the time the floor is acclimating to thoroughly read the manufacturer’s instructions.  Instructions should be precisely followed to avoid warranty issues.
•    You need a level, no bounce sub floor to lay the planks over.  The floor should be sound and flat with no void greater that three inches.
•    Carpet is not recommended substrate for a laminate.  If you install over it and drop something heavy, you will shatter the flooring because the soft carpet underneath.
•    Most laminate flooring can be installed over low-temperature radiant heating.
•    Although concrete is an acceptable underlayment, it is wise to check the slab for moisture, especially, if it is constructed over a crawl space.  To do so, tape a 30-inch by 30-inch sheeting of polyethylene to the slab for 24 hours using duct tape.  If condensation droplets appear on the underside of the sheeting, moisture may be an issue and a moisture-resistant sub-floor should be installed.
•    Most laminate flooring manufacturers make a transition strip that is designed to go between the new flooring and carpet.  Make sure to ask the salesman where you purchased the flooring what is available and about coordinating tones.

I hope that after reading these pointers, you decide to talk to your local retailer about a professional installation.  It may be a wise decision and cost you less money in the long run!